Questions tagged [number-sequence]

A puzzle that asks for the pattern in a given number sequence.

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4
votes
0answers
100 views

What are the missing numbers in this group of 7?

The following groups of 7 number in each line, are related in each line in a unique way: ...
1
vote
4answers
822 views

What is the question mark?

My friend gave me this sequence of numbers: 3=11 6=12 11=13 14=14 361114=A A=? Which number can replace the question mark?
4
votes
1answer
176 views

Enigma between Colleagues (Part2)

Let's give a second try with something more creative. Here is the sequence : 161 = B 198 = W 173 = ∅ 246 = B 215 = W 227 = B 192 = ∅ 184 = ? Don't hesitate to ...
9
votes
1answer
206 views

Enigma between Colleagues (Part1)

With a colleague, we tried to create enigma to challenge ourselves. Here is our first try, hope you will enjoy it. 4 = 2 12 = 3 19 = 3 24 = 4 47 = 5 50 = ? Hint 1 : Don'...
6
votes
1answer
126 views

Find the next number in the following sequence [Mind bender]

I came across this sequence in the paper: 109080, 12123, 1350, 153, ? What could be the next number? And what is the pattern that connects these numbers? Dividing a term by the next term leads to a ...
4
votes
1answer
422 views

What is the next sequence of numbers?

Seven and seven is forty-two, Eight and nine are fifty; Ten and eleven are sixty-two, And twelve and twelve are five. What is the next sequence of numbers?
14
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1answer
1k views

Name These Animals

Can you definitively name these animals? More importantly, can you find and extend the hidden number sequence? With elegant, long ears, precious huge animals need to be protected. Winter predator ...
3
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2answers
168 views

How to find number of times sequence element $1$ is approached and from where?

Consider a sequence $1,-1,-1,-1,-1,-1,...,-1$. Start at the first element and move down the sequence according to the following rules: 1) If you jump from a $-1$ to another $-1$, turn the latter into ...
3
votes
1answer
180 views

Next term of the series

Find the next term of the series $79,95,25,39,99,$____ $(1)$ $117$ $(2)$ $81$ $(3)$ $243$ Source: IBPS PO mains exam in India
10
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2answers
925 views

Somebody hacked my clock

Harvey the hacker hacked my clock. At first, the results made no sense, but I eventually figured out his logic. ...
4
votes
1answer
143 views

Saturdays' Sequences

0.469281 0.267974 0.333333 0.333333 0.666667 0.499346 0.333333 2 2 1 1 2 2 1 3 2 F 0 0 0 0 U P F O X F E 0 0 1 1 2 1 1 Here are 5 intertwined sequences. I will add one sequence each saturday ...
26
votes
5answers
4k views

An unusual and very hard number sequence problem

I heard this number sequence problem about 25 years ago from a maths lecturer. What number should go in the place of the question mark in this mathematical sequence: $..., 30, ?, 60, 90, 140, 225, ...
11
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7answers
2k views
16
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5answers
1k views

Sequence puzzle

This is a sequence puzzle I found online which I'm stuck on: 452801, 773924, 102410, 471056, ? I figured out how to get from the first number to the second (+3, +2, +1, +1, +2, +3) for the digits, ...
8
votes
2answers
737 views

IX-NAY on the IX-SAY

Will this sequence ever have a 6 in it? 9, 1, 1, 1, 10, 3, 1, 1, 10, 5, 1, 1, 10, 1, 5, 2, 1, 1, 10, 1, 1, 1, 5, 4, 1, 1, 10, 3, 1, 1, 5, 1, 1, 1, 5, 2, 1, 1, 10, 5, 1, 1, 5, 3, 1, 1, 5, 4, 1, ... ...
3
votes
3answers
821 views

Find the wrong number in the given series: 6, 12, 21, 36, 56, 81?

The following problem was given to me by one of my friend: Find the wrong number in the given series: $$6,\, 12,\, 21,\, 36,\, 56,\, 81 $$ ? A) $21\,$ B) $12\,$ C) $36\,$ D) $56$ and ...
2
votes
0answers
114 views

What should be the missing number? [closed]

What would be the missing number?
2
votes
1answer
127 views

What is the missing item in this symbolic or numerical series/set?

Determine the missing item. I I I I V V V V XV XV XV XV XVI XVI XVIII XVIII XVIII XVIII XIX XIX XX XX XX XX ?
2
votes
3answers
120 views

IQ test sample patterns. Can anyone find the missing number? [closed]

I am fully hopeful that you can crack this puzzle. You need to answer with an explanation.
6
votes
1answer
112 views

Number sequence labyrinth

Can you find the way out of the labyrinth ? Rules: Each color you pass is a number (or character) sequence, you have to note the solution of this sequence. When you're out of the maze, your ...
-5
votes
1answer
101 views
0
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1answer
62 views

The missing number in a sequence [duplicate]

What is the missing number represented as "?" 10,11,12,13,14,15,16,17,20,22,24, ?,100,121,10000
2
votes
1answer
115 views

Deduce Distinct Digits of the Given Fibonacci Sequence- Detail all Steps

$DEPUS$ $SRST$ $UDQD$ $CTQU$ $DTPR$ $PQR$ $SDE$ $VRR$ $CVV$ $DUU$ $QP$ $TT$
0
votes
1answer
55 views

Puzzle on a blackboard [closed]

What is the missing number in the picture above?(question is from some puzzle game) I tried some approaches, but haven't found any meaningful rule..thanks in advance!
-3
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1answer
78 views

Strange? Primes and Palindromes have no business being in this Place?

$1$ $1$,$2$ Good easy start $1$,$2$,$4$ As expected $1$,$2$,$4$,$8$ I know it is going to be easy $1$,$2$,$4$,$8$,$16$ why is he giving this? I got it! $1$,$2$,$4$,$8$,$16$,Prime ...oops!.....
14
votes
1answer
337 views

What's up with my calculator?

As I am wont to do, I got a new calculator the other day. Obviously it needed a few test calculations: 5 + 6 = 11 22 - 17 = 5 10 + 3 = 13 4 * 6 = 24 OK, so ...
4
votes
1answer
349 views

Number sequences: 6X000X9, 700XX08,00000015,?,00000015

Here is the question: 6X000X9,700XX08,00000015,?,00000015,?,00000015 This question actually comes from the puzzles made by my friend. He gave me his puzzles recently but I couldn't figure it out. ...
5
votes
2answers
111 views

Mathematical Series

I was just going through some series and came across one which I wasn’t able to solve. The first 8 numbers of the series are: 1,3,7,19,53,153,449,1331,... Can anyone tell me a mathematical formula ...
3
votes
1answer
215 views

The Mathematical Puzzle That Is So Mathematical It Will Blow Mathematical Minds Of Mathematics Away!

Here is a short sequence that I made when brainstorming puzzles: 19 101 920 20009 701 104 403 311 3000000000000000003 ... You need to figure the ...
4
votes
1answer
113 views

Deduce the Missing Terms in the Sequence

$NINE$ + $5$ $EIGHT$ + $3$ $SEVEN$ + $2$ $???$ + $?$ $FIVE$ + $1$ $????$ + $?$ $?????$ -$?$ $???$ - $?$
-6
votes
1answer
69 views

Give these Digits their own Place..Place them Right

In their own Circle. Such that the arrows point to successive numbers . Start with 1 and end with 9. There might be more arrows than necessary. Find the solution with least number of arrows ignored.
-1
votes
1answer
61 views

Complete my number sequence

Can you complete following number sequence ? 389919, 1308, 93, ?, ? Hint:
5
votes
2answers
713 views

Number sequence: 202500, 5184, 32400, 12960,?

Can you solve my first selfmade number sequence ? 202500, 5184, 32400, 12960, ? Hint: Hint: Hint
3
votes
0answers
597 views

Number Sequence Series-Question 7

This is a series of questions that are created by me. Here is question 7: (23),(55),(155),(1255),?,?,(56139611) I will give a hint to you guys in one month if nobody can solve it.
5
votes
1answer
448 views

NSE Numerical IQ Test no.12: 759802, 358829, 847123,?

This is a question from the NSE Numerical IQ Test by Theodosis Prousalis and Ivan Ivec: 12) 759802, 358829, 847123, ? After 2 hours, I can't figure out the answer. I've only made these ...
3
votes
1answer
88 views

Another cool number-sequence puzzle

The task is to find x. (Source https://free.ultimaiq.net/nse.htm) 123456, x , 93332736, 3359978496
1
vote
1answer
194 views

What is the missing number in set B?

A {6, 2, 2, 2, 16, 2} B {37, 37, 3, 3, 3, ?} The numbers in set A relate to one another through a numerical or abstract pattern. Set B has a similar or a somewhat contrasting pattern .The task in ...
4
votes
1answer
155 views

Prime Knight travels through Prime Country

Prime Knight travels through Prime Country... Ride along and Document Details of his Journey As this Prime Knight (only chess move allowed) journeys through Prime land, he makes a pit stop at every ...
4
votes
1answer
147 views

Fill.in the two missing terms in this Simple Sequence

What are the two missing numbers in the sequence shown below: $$\def\S{\phantom{XX}} \large\begin{array}{|c|c|c|c|c|c|}\hline \S&\S&\S&\S&\S&\S\\[-10px] 4 & 5 & 6 & 7 &...
-4
votes
1answer
111 views

Prime Sequence…a little bit Unusual about the Missing Members

What are the Missing Members in this Prime Series? what is the Significance of this Sequence? $19$, $17$, $13$, $?$, $?$, $3$, $2$
4
votes
3answers
241 views

What are the missing members in this sequence based on the digits 0 to 9?

Find the missing members? 0, 0, 2, 0, 2, 3, 0, ?, ?, ? Hint 1
5
votes
3answers
197 views

Find the Missing Members of this Powered Sequence

There are 4 missing members in this small series...labeled ???. Hint 1; Hint 2: Complete the series. $191$, $426$, $931$, $???$, $???$, $646$, $971$, $???$, $???$
1
vote
1answer
183 views

Find the missing number in the matrix [closed]

Find the missing number, $x$, in the following matrix $$\begin{matrix} 16 & 13 & 9\\ 11 & 8 & 6\\ 9 & 7 & x \end{matrix}$$
2
votes
1answer
219 views

Mathematical Sequence Based on Prime Numbers

This sequence is based on prime numbers Hint 1: 16, 17, 11, 16, 10, 8, 13, 7, 14, 8, 11, 7, 5, 10, 4, 11, 5, 10, ?, ?, ? What are the final three numbers?
3
votes
1answer
414 views

Who are the Missing Members of this Noble Family?

Could you please find the Missing Nobles? $118$, $?$, $54$, $?$, $18$, $10$, $?$
-2
votes
1answer
191 views

What is the next item in the following sequence?

11111111, 333333, 5555, 77, ? Find the most complete and simplest solution that fits.
3
votes
1answer
161 views

Another Number Sequence…Yayy!

Find the next terms and also, explain the logic used for the terms of the sequence. $3,7,11,15,20,27,?????$ Hint : Autobots, This is Optimus Prime.
4
votes
3answers
308 views

Number Sequence Series – Question 1

I want to share a question that is created by myself. I will give a hint in 24 hours and my answer in 3 days given that nobody could answer my question. Here is my number sequence: $3/2, 2/3, 3/4, ...
-2
votes
1answer
147 views

What is next: 2, 3, 5, 13, 89, 233, …? [closed]

Based on what is shown, what is the next number in the sequence?
-4
votes
1answer
128 views

Simple Rule Generates this Sequence from Well Known Number Series

First 6 terms generated on applying the simple rule are displayed here. 5, 8, 18, 102, 322, 1830, ?, ?, ? Hint 1: Hint 2: Hint 3: